Trumpet



April 26, 1949. o. w. scHLuMs 2,468,518

' TRUMPET Filed Jan. 5, 194e 2 sneaks-sheet 1 4' IN1 "Wil 4. r nllll'l 'Hump' w April 25, 1949i o.A w. scHLuMs 2,468,518

TRUMPET Filed Jan. 5, 1946 2 Sheets-Sheet 2 INV ENTOR.

BY Ozie* MSM Patented Apr. 26, 1949 UNITED STATES PATENT OFFICE TRUMPET Otto W. Schlums, Whitinsvillc, Mass., assignor to Whitin Machine Works, Whitinsville, Mass., a corporation of Massachusetts Application January 5, 1946, Serial No. 639,386

7 Claims. 1

This invention relates to trumpets used for condensing and guiding the slivers in textile drafting or drawing machines, such as cards, combers and drawing frames. Such trumpets are commonly mounted on stop motion levers, which are normally held down by the pull of lthe sliver but which rise and activate the stop motion on breakage of an associated sliver.

It is desirable to condense and guide each sliver to a point as close as practicable to the calender rolls. With the usual trumpets, however, this distance must be nicely adjusted to ythe length of the fibre, and even then libres from a bunch caught in a trumpet may extend into the bite of the rolls and exert enough pull to hold the trumpet lever clown and prevent the stop motion from operating, even after the feed of the sliver has been interrupted.

It is the general object of my invention to provide an improved trumpet for the purposes above set forth, so constructed that the sliver is guided close to the calender rolls but that at the same time the trumpet lever is free to activate the stop motion on the lodging of a bunch in the trumpet.

A further object of my invention is to provide a trumpet having a partially relieved guiding portion below the usual condensing portion, and in which relieved portion the sliver will be broken on the lodging of a bunch in the trumpet. I also provide a construction in which twin trumpets coact to produce an analagous result.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

Preferred forms of the invention are shown in the drawings, in which Fig. l is a sectional side elevation of portions of a drawing frame with my improved trumpet operatively mounted therein;

2 is an enlarged side elevation of the trumpet;

Fig. 3 is a front elevation, looking in the direction of the arrow 3 in Fig. 2;

Fig. 4 is a sectional plan view, taken along the line #-4 in Fig. 3;

Fig. 5 is a front elevation, partly in section, showing twin trumpets in operative relation; and

Fig. 6 is a longitudinal sectional view, taken along the line 6-6 in Fig. 5.

Referring to Fig. l, I have shown portions of a drawing frame for a sliver S and including a plurality of pairs of drawing rolls Il! mounted on a fixed frame Il, a pair of calender or delivery rolls l2 similarly mounted, a coiling head i4 continuously rotated by any usual driving mechanism, and a can l5 in which the drafted sliver S' is coiled.

All of the parts thus far described are of the usual commercial construction, as is also the trumpet lever 25.3 on which is mounted my improved trumpet T. The lever 20 controls any usual stop motion and is -so constructed and mounted that it is held in the position shown in Fig. l by the normal pull of the sliver S' passing therethrough. On breakage of the sliver, however, the trumpet 'I' rises and the opposite end of the lever 2li drops to complete an electric circuit or to otherwise activate a stopping mechanism.

My improved trumpet T is shown in detail in Figs. 2, 3 and 4 and comprises a head 30, a cylindrical middle portion 3l and a tapered lowered end portion 32. A conical depression 33 in the head 3l! guides the drafted sliver S' to a relatively restricted passage 34 in which the sliver S is condensed or compres-sed to round and relatively compact form.

Below the passage 34, I provide a passage 35 relieved to a somewhat increased diameter, and I also cut away one side of the cylindrical portion 3l for a substantial distance as indicated at 36. I al-so slab off the lower end portion of the trumpet as shown at 31 (Fig. 4) and provide a slot 38 in this portion 31.

The levers 2li are so positioned that the lower end portions of the trumpets T extend closely adjacent the calender rolls l2 as shown in Fig. 1, this having the advantage that the sliver is pre-sented to the rolls in circular section, rather than in the flat or ribbon-like form which it might otherwise assume. At the same time, the restricted passage 34 is so far removed from the calender rolls I2 that the sliver will readily break in the relieved passage $5 if a bunch is caught in the conical depression 33. Failure of the stop motion to operate, due to bres caught between the calender rolls, is thus effectually avoided.

The cut-away portion 35 and the slot 38 are provided to facilitate threading of the trumpet, and the end of each trumpet lever 30 may be recessed for the same purpose, as shown at 40 in Fig. l.

In Figs. 5 and 6 I have shown my invention adapted t0 twin trumpets, which may be used, for instance, in a construction as shown in Banfield Patent No. 2,301,677, issued November 10, 1942. In such a construction, the trumpets T' are mounted in trumpet levers 50 and 5l and are so disposed that their condensing passages 52 converge to a common center at the bite of calender rolls 53, one only of which is shown in Fig. 5.

The trumpets T are a modification of the trumpet 1T. showninligs. 2 to `5, and each .trumpet comprisesiavaheadportion ibavingffa tapered-1 or slightly conical extension El through which a condensing passage 52 extends.

A guide-plate 63 has a sleeve-like portion lili partially embracing the extension 6l and peremanently secured thereon, as by weldingK or soldering. Ihe lower part of"the:guideeplatexis" formed with a concave or di'shedinner surface. 15,.

65 and with converging lower edge portions 66.'

The trumpets T of an associated; pair .arerdise`- posed at opposite angles, as shown in Fig..,.5, and with the guide-plates i53- adjaccntly disposed to forma converging passage. The lower end por- A20 tions: 6t'a1e close' enough together Ato compress andguidef-th'e associated/islivers `tothabite4 of th'e'calender rolls,I while'at-the same'timethe relieved passage formed by the guide=plates531belowgthe condensing `passages 52 VYallows theiibres 25 to' bev 'drawn downWardfa-rrd the' sliver i to be" 'brokem in' the event ofa bunchl vlodging 'in the conical entrance recessI 68 of either' of the` trumpets Tf?.

With' botlor-ms of myin-VentiOn; threading is 30 iacilitatedbyhaving the lower yguidepassages cut; awayjorppenat the side; In threadingthe single"A trumpets Tjshown in Figs. 2 to 4, itiis suflicierlt todraw"tlie end fof the sliver through the cutaway "fp-ortionfSG' and lthen vdrop-the end of the 35 sliver between the calender rolls l2, whereupon the sliver 'will' 'be automatiically'-drawn @through the 'slotl and intol the lowe1"endof.'the'relieved passage -'35."1

My iinvention is'particularly useful when' draft' iu ingnfi'bresof lmore 'than-normal length; ,as `resetting` ofthe trumpets is not necessary.

Having' thus describedv my inventionpand the advantages thereof, Ido not lwish' to be limited to `the'details Aherein disclosed, otherwise ,than as 45' set forth in the claims; but what 'I claim is:

1. In.. a fibre drafting-` mechanism; having; calenderrolls, twin trumpetsgset'at oppositelyjn-f clir1ed',anglesA and having a commonv delivery; point, said trumpets deliveringsliver direct toV said calender rolls and each having a restrictecl` condensingjplssage and" having, a..delivery passage extending ,entirely through kthe eXitAend of" said'trumpet fand .of substantially, greater cross section 'throughout tits lengththan said condens- 35i guideeplate providingc a relatively/ open. lower 65" passage through which the sliver is drawn relatively freely and is delivered direct to said calender rolls at said common delivery point.

3. A trumpet comprising a unitary body including a head portion and a shank portion eX- tending therefrom, a conical entrance passage in said head portion, an axiallydisposed cylindrical deliveryy;v passage .in saidshank portion fand an axially disposed "restricted cylindrical passage connecting said entrance and delivery passages, said restricted passage being of less diameter than said delivery passage.

4. The device as defined in claim 3, wherein said shankiportionisiormed with a lateral openinggcommunicatingwith said delivery passage.

5l' In a nbre-drafting mechanism having calender,froll`sanclfA a trumpet delivering sliver direct to .said calender rolls, that improvement whichcomprises providing said trumpet with an entrance portion having a constricted condensing passage-handhaving af delivery passage -oiisubstantial length" and'; of substantially increased*y crossfsect-ion and effective to guide' the condensed sliver fun-der reduced 4compression 'and rela-tively` freely entirely Vthroughsaidffdeliver'y passage -to the exit end of saidtrumpet andfto'thefpoint of deli-verym said-nbrebyfsaid trumpet, and-the fcompression ofthe iibrebeingreduced throughout said delivery passage both4 axially -and trans,-V ver-sely` o'said -passage.-

6:'v` Inh a ibre-drafting mechanism having calender-rolls and' a-trumpet deliveringsliver; directl to--saidcalender rolls, that improvement,l which lcomprises providing saidwtrumplet with an j entrancel portionmhaving "a restrictedcondensing-g passage: and withva' deliveryportion havingl a relatively long' delivery vpassage ofsubstantally greater dimensions I'on all diameters'andthroughout its length and -througlrwliichethe less con densed I sliver may pass relativelycfreef' direct `to th'efcalender'rolls;

7. "Thee combinationa" fibre-drafting mechanism asset iorthdn'vgclaim-; in-which the delivery' passage f-is cut= away--on 4`one ,side at its; entrance part to facilitate, threading'x of said trumpet.

REFERENCES? `lCITED..

'TheA following y references are of record'finA the file-ofA thisL patent:

UNITED STATES PATENTS 

